990921100001012 has 24 divisors (see below), whose sum is σ = 1771386426351360. Its totient is φ = 484815198459680.

The previous prime is 990921100001011. The next prime is 990921100001029. The reversal of 990921100001012 is 210100001129099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990921100001011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562366439 + ... + 564125742.

It is an arithmetic number, because the mean of its divisors is an integer number (73807767764640).

Almost surely, 2^{990921100001012} is an apocalyptic number.

It is an amenable number.

990921100001012 is a deficient number, since it is larger than the sum of its proper divisors (780465326350348).

990921100001012 is a wasteful number, since it uses less digits than its factorization.

990921100001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126496911 (or 1126496909 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 990921100001012 in words is "nine hundred ninety trillion, nine hundred twenty-one billion, one hundred million, one thousand, twelve".